{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical", "Disease"], "input": "Assessment was done on the following : prenatal screening for hepatitis B and rubella , administration of the hepatitis B vaccine birth dose to all infants , administration of hepatitis B immune globulin to infants who were born to hepatitis B surface antigen - positive mothers , rubella immunity , and administration of in - hospital postpartum rubella vaccine to rubella nonimmune women ."}
{"Chemical": ["hepatitis B surface antigen"], "Disease": ["hepatitis B", "rubella"]}